I really like Yamaha drums myself, but I definately think that with kits like the Saturn (you could add Gretsch Renown, Pearl Session Studio Select and to a degree, Tama Starclassic W/B in there as well) makes one question just how much more money it is worth to spend to get a kit of any more perceived quality, badges and logo aside. I understand you pay more for a well-known brand, but I still feel, at least here in Europe, that paying about double the price for a Oak Custom Hybrid (which aren't even ranked as their top of the line kit) than a Mapex Saturn is somewhat questionable, just thinking about what you are actually getting for the money.
Then again, I had a Saturn myself, that I decided to sell. Reason? Well, they definately sounded awesome and looked the part. I got a great offer on them when I sold it that helped, of course. But there is just something about being proud of what you play and how you are being perceived when gigging, you would want to use something that you don't have any bad feelings or annotations about, at least if you are a gearhead like me, care (maybe a bit too much) about your equipment and have the money to get a high-end kit regardless. I constantly had to make conversations with other drummers that claimed Mapex made s**** drums, and just people in general that wanted to chit-chat and the main argument I would always try to sell; "well they are really good quality drums for the price". Sure, they really are. But it came to the point that I got a bit tired of it all, having to almost "defend" myself of why I bought the drums, since I definately could have afforded a high-end kit from another brand anyway. It's vain, I know, but as I also have a habit of switching kits every now and then, I decided I wanted to let them go for now.
My point to all this? I'm not sure... I would be proud to play that Yamaha kit if I already had paid for it, but I definately feel you pay a bit too much if you take into consideration the kits I mentioned in the first sentence. If money allows though, it's best to pick the kit you have your heart set on, all aspects considered, even if it means you pay more for it. At least that's how I feel about it now. Paying more for it just affects your wallet at the time of your purchase, you have to consider that you would like and be proud of this kit in the long run, so it might very well be worth it.